linux-kernel - [PATCH 12/31] mn10300: handle page-less SG entries

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Message-Id: <1439363150-8661-13-git-send-email-hch@lst.de>
Date:	Wed, 12 Aug 2015 09:05:31 +0200
From:	Christoph Hellwig <hch@....de>
To:	torvalds@...ux-foundation.org, axboe@...nel.dk
Cc:	dan.j.williams@...el.com, vgupta@...opsys.com,
	hskinnemoen@...il.com, egtvedt@...fundet.no, realmz6@...il.com,
	dhowells@...hat.com, monstr@...str.eu, x86@...nel.org,
	dwmw2@...radead.org, alex.williamson@...hat.com,
	grundler@...isc-linux.org, linux-kernel@...r.kernel.org,
	linux-arch@...r.kernel.org, linux-alpha@...r.kernel.org,
	linux-ia64@...r.kernel.org, linux-metag@...r.kernel.org,
	linux-mips@...ux-mips.org, linux-parisc@...r.kernel.org,
	linuxppc-dev@...ts.ozlabs.org, linux-s390@...r.kernel.org,
	sparclinux@...r.kernel.org, linux-xtensa@...ux-xtensa.org,
	linux-nvdimm@...1.01.org, linux-media@...r.kernel.org
Subject: [PATCH 12/31] mn10300: handle page-less SG entries

Just remove a BUG_ON, the code handles them just fine as-is.

Signed-off-by: Christoph Hellwig <hch@....de>
---
 arch/mn10300/include/asm/dma-mapping.h | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/arch/mn10300/include/asm/dma-mapping.h b/arch/mn10300/include/asm/dma-mapping.h
index a18abfc..b1b1050 100644
--- a/arch/mn10300/include/asm/dma-mapping.h
+++ b/arch/mn10300/include/asm/dma-mapping.h
@@ -57,11 +57,8 @@ int dma_map_sg(struct device *dev, struct scatterlist *sglist, int nents,
 	BUG_ON(!valid_dma_direction(direction));
 	WARN_ON(nents == 0 || sglist[0].length == 0);
 
-	for_each_sg(sglist, sg, nents, i) {
-		BUG_ON(!sg_page(sg));
-
+	for_each_sg(sglist, sg, nents, i)
 		sg->dma_address = sg_phys(sg);
-	}
 
 	mn10300_dcache_flush_inv();
 	return nents;
-- 
1.9.1

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